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Internal Ecosystem Feedbacks Enhance Nitrogen-fixing Cyanobacteria Blooms and Complicate Management in the Baltic Sea
To effectively reduce cyanobacteria blooms and overall signs of eutrophication, reductions in both nitrogen and phosphorus external loads appear essential. Expand
Predation vulnerability of planktonic copepods: consequences of predator foraging strategies and prey sensory abilities
The hydrodynamic model accurately predicted the positive relationship between stickleback approaching speed and copepod reaction distance, as well as the difference between the 2Copepod species, and suggests that, by using simple artificial flow experiments, it can rank various zooplankton species according to their escape capabilities, and thus predict their vulnerability to predation by small fish with different motility patterns. Expand
Food utilisation of pelagic mysids, Mysis mixta and M. relicta, during their growing season in the northern Baltic Sea
The stomach analysis suggests that the mysids needed to attain a threshold size of 8 to 11 mm to initiate feeding on the more evasive copepods, which suggests that copepod are an important energy source for M. mixta in late summer. Expand
Mesozooplankton of the gulf of finland and northern Baltic proper a review of monitoring data
A review of meso zooplankton population densities and biomasses in the Gulf of Finland and northernmost Baltic Proper is presented based on monitoring data collected over the period 1968-1990, with Acartia bifilosa, Eurytemora affinis, Bosmina longispina maritima (Cladocera) and Synchaeta baltica (Rotifera) found to be the most important species. Expand
Prey switching behaviour in the planktonic copepod Acartia tonsa
It is suggested that prey switching by copepod may provide survival windows for microzooplankters during blooms of net phytoplankton because predation pressure from the copepods is then less, and turbulence favours the selection of cillates as prey. Expand
Trophic transfer of cyanobacterial toxins from zooplankton to planktivores: Consequences for pike larvae and mysid shrimps
The results suggest that dissolved cyanobacterial toxins released during bloom decay can have a negative impact on feeding and, hence, on the growth of fish larvae via zooplankton, even without direct contact between cyanobacteria and the fish. Expand
Proportion of copepod biomass declines with decreasing salinity in the Baltic Sea
The biomass ratio of copepoda/cladocera decreased in the Northern Baltic Archipelago Sea (SW Finland) in concert with a decrease in the seawater salinity during the 1980s. There also was an increaseExpand
Calanoid resting eggs in the Baltic Sea: implications for the population dynamics of Acartia bifilosa (Copepoda)
Indirect evidence suggests that the marked spring peak of Acartia spp. Expand
Changes in northern Baltic zooplankton and herring nutrition from 1980s to 1990s: top-down and bottom-up processes at work
It is suggested that bottom-up processes mediated via changes in mesozooplankton species composition have also influenced herring growth and that both of these processes are affected by the same environmental factor-the Baltic salinity level. Expand